interface IPostService
    {
        void AddPost(Post post);
        IList<Post> GetPosts();
        Post GetPost(int PostId);
        int RemovePost(Post post);
        int UpdatePost(Post post);
    }

 public  class PostService<T>:IPostService where T:Post
    {
      private readonly IUnitOfWork _uow;
      private readonly IDbSet<T> _post;
      public PostService(IUnitOfWork uow)
      {
          _uow = uow;
          _post = _uow.Set<T>();
      }
        public void AddPost(T post)
        {}

        public IList<T> GetPosts()
        {}
//...
{